Sha256: f641a19297ca77dee6887aa98d0bcad73579ec832e0c34dc11e3eb68e690cea9
Contents?: true
Size: 1.57 KB
Versions: 375
Compression:
Stored size: 1.57 KB
Contents
/**
* A map from HTML tag names to a boolean which reflects whether it is
* appropriate for scrollable elements found in the focus order.
*/
const VALID_TAG_NAMES_FOR_SCROLLABLE_REGIONS = {
ARTICLE: true,
ASIDE: true,
NAV: true,
SECTION: true
};
/**
* A map from each landmark role to a boolean which reflects whether it is
* appropriate for scrollable elements found in the focus order.
*/
const VALID_ROLES_FOR_SCROLLABLE_REGIONS = {
application: true,
banner: false,
complementary: true,
contentinfo: true,
form: true,
main: true,
navigation: true,
region: true,
search: false
};
/**
* @param {HTMLElement} node
* @return {Boolean} Whether the element has a tag appropriate for a scrollable
* region.
*/
function validScrollableTagName(node) {
// Some elements with nonsensical roles will pass this check, but should be
// flagged by other checks.
const nodeName = node.nodeName.toUpperCase();
return VALID_TAG_NAMES_FOR_SCROLLABLE_REGIONS[nodeName] || false;
}
/**
* @param {HTMLElement} node
* @return {Boolean} Whether the node has a role appropriate for a scrollable
* region.
*/
function validScrollableRole(node) {
var role = node.getAttribute('role');
if (!role) {
return false;
}
return VALID_ROLES_FOR_SCROLLABLE_REGIONS[role.toLowerCase()] || false;
}
/**
* @param {HTMLElement} node
* @return {Boolean} Whether the element would have valid semantics if it were a
* scrollable region.
*/
function validScrollableSemantics(node) {
return validScrollableRole(node) || validScrollableTagName(node);
}
return validScrollableSemantics(node);
Version data entries
375 entries across 375 versions & 1 rubygems